Fatal error: Uncaught Error: Class 'FFMpeg\Filters\AdvancedMedia\AbstractComplexFilter' not found in C:\xampp\htdocs\plugins\FFMpeg\Filters\AdvancedMedia\TestSrcFilter.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\plugins\FFMpeg\Filters\AdvancedMedia\TestSrcFilter.php on line 12